Type 8746

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1.

General technical data

1.1. General

Product properties

Dimensions

Further information can be found in chapter “4. Dimensions” on page 8.

Material

Seal

FKM or EPDM (depending on gas) 1.)

Housing

Die-cast aluminium (coated)

Base block

Aluminium or stainless steel 1.4404/316L

Configuration management

Further information can be found in chapter “9.3. Configuration management for easy

device replacement” on page 36.

Electrical data

Operating voltage

24 V DC

Residual ripple

± 2 %

Voltage tolerance

± 10 %

Electrical connection

büS/CANopen variant

M12 plug, 5-pin

Analogue variant

M12 plug, 5-pin, M12 socket, 5-pin

Industrial Ethernet variant

M12 plug, 5-pin, 2 x M8 socket, 4-pin

PROFIBUS-DP variant

M12 plug, 5-pin, M12 socket, 5-pin

Medium data

Operating medium

Neutral, pure gases (others on request)

Calibration medium

Operating medium or air

Medium temperature

- 10 °C 2.)…+ 70 °C (- 10 °C 2.)…+ 60 °C with oxygen)

Process/Port connection & communication

Analogue interface

4…20 mA, 0…20 mA, 0…10 V or 0…5 V

Input impedance: > 20 kΩ (voltage) resp. < 300 Ω (current)

Maximum current: 10 mA (voltage output)

Maximum load: 600 Ω (current output)

Digital communication interface

büS/CANopen, EtherCAT®, EtherNet/IP, PROFIBUS-DP

Port connection

G or NPT ¼", ⅜", ½", ¾", 1", sub-base

Environment and installation

Installation position

Horizontal or vertical

Ambient temperature

- 10 °C…+ 50 °C (higher temperatures on request)

Accessories

Software

Bürkert Communicator

Further information can be found in chapter “9.1. Bürkert Communicator software” on

page 35.

1.) In addition, when using the electromotive proportional valve:

- Type 3280 DN4: PEEK valve seat seal

- Type 3285: Al

2O3 valve seat seal

2.) When using the electromotive proportional valve, the minimum medium temperature is 0 °C.

1.2. Variant with electromagnetic proportional valve

Type 8746 can be configured as MFC or MFM as required. The MFC variant uses direct-acting proportional valves of the 287x series. These

electromagnetic proportional valves are normally closed and stand for highest measuring accuracy and repeatability with settling times

resp. response times of a few hundred milliseconds.

Product properties

Dimensions

Further information can be found in chapter “4. Dimensions” on page 8.

Total weight

Approx. 1800 g (aluminium, 16 W valve)

Approx. 3100 g (stainless steel, 16 W valve)

LED display 1.)

RGB LED according to NAMUR NE107

Control valve (proportional valve)

Normally closed

Valve orifice

0.8…12 mm

K

VS value range

0.02…2.5 m3/h

Performance data

Nominal flow range (Q

nom)

20…1500 l

N/min (N2)

MFM up to 2500 l

N/min (N2)